Cut-out



(Ne Model.)

0. 1). WRIGHT.

GUT-OUT.

No. 885,494. Patented July 3, 1888.

WITNESSES:

INVENTOR:

Mum/m ATTORN UNITED STATES PATENT QFFICEQ CHARLES D. VEIGHT, OF PETERSBURG, ILLINOIS,

CUT-GUT.

SPECIFICATION forming part of Letters Patent No. 385,494, dated July 3, 1888.

Serial No. 262,490. (No model.)

To aZZ whom it nmy concern.-

Be it known that I, CHARLES D. \VRIGIIT, of Petersburg, in the county of Menard and State of Illinois, have invented a new and linproved CntOut for Electric-Light Oircuits,of which the following is a specification, reference being had to the accompanying drawing, which is a side elevation of my improved cutout apparatus, showing the dynamo and lampcircnit diagrammatically.

Vhen a dynamo furnishing a current to an arc-light circuit is short-circnited, tho arma ture is liable to be burned by the heavy current generated in themachine before the regulating devices connected with the dynamo can act.

The object of my invention is to provide a cut-out l'or electric-light circuits which will throw a suitable amount of resistance into the circuit when the current in the circuit becomes abnorinal, thereby avoiding the burning out of the armature of the machine.

My invention consists in the combination, with an electro-magnet placed in the electriclight circuit near the dynamo, of a cut-outle ver arranged to close the main circuit through the electromagnet, aweighted armature-lever carrying a catch adapted to hold the cut-out lever during the normal working of the circuit and to release the cut-out lever when the current increases above the normal, and a re sistance connected by one terminal with the main circuit and adapted to be thrown into the main circuit at its other terminal by the action of the cut-out lever, all as hereinafter more fully described.

In the case Aismonnted the electro-magnet B, and in front of the said magnet 13 is supported the right angled armature-lever 0, adapted to turn on the pivot (a. The arm 5 of the armature-lever G supports the armature c opposite the poles of the magnet Band within the influence oi the said poles. The extremity of the arm 0 is provided with a catch, (1.

- The arm 0 of the right-angled armature-levee G is provided with a wei ht, j, which tends to withdraw the armature c from thepoles ot' the magnet T3.

In the casing A. is pivoted the cnt-ontlever D upon a stud, g, and the free end of the said cut-out lever is beveled and engaged by the catch it during the normal working of the circuit in which the instrument is placed. To the top of the cut-out lever D is attached a flat spring, it, which contacts with the screw 2' when the lever is in its normal position. The lever D carries a pin, 7', which projects from the side thereof, and in the bottom of the easing A is arranged an S-shaped spring, E, in the path of the pin 7', the S-shaped spring being arranged with reference to the pin j so that when the lever D is thrown down in the manner presently to be described the pin j .will enter between two of the folds of the S-shaped spring, as shown by the dotted lines in the drawing.

The top of the easingis provided with binding-posts k Z, and the bottom of the casing is provided with binding-posts m a. The binding-post Z is connected with one terminal of the magnet 13 by the wire 0, and the wire 0 com 11] nnicates with the binding-post a by the wire p. The remaining terminal of the elec' tro magnet B is connected by the wire q with the contaet-screw z. The pivot g of the cutont lever D is connected by the wire 1) with the binding-post 7s. The binding-post m is connected with the S-shaped spring E, and the binding-posts m a communicate electrically with the terminals of. the resistance F. The cutout lever is connected closely with the dynamo G by the wire 8, which is received by the binding-postl. The outside circuit-wires, 1. a, of the clectric light circuit are connected with the dynamo and with the binding-post Zz, said circuit including the lamps '0. .Vhen the electriclight circuit is working normally, the parts rest as shown in full lines in the drawing, and the current passes from the dynamo through the conductor 5, binding-post Z, wire 0, magnet B, wire (1 screw '1, spring 11, lever D, wire 1), bindingpost Zr, and outside circuit wires, u '1, back to the dynamo.

The armaturelever G is weighted, so as to oppose the attraction of the magnet B during the normal working of the circuit; but when the dynamo is shortcircuited the magnet B attracts the armature c with sufficient force to overcome the pressure of the weightf, thus turning the armature-lever O on its pivot and releasing the cut-out lever I), when the spring 72 throws the lever D down, causing the pinj to enter between the folds of the S-shaped spring E, and shifting the circuit so that the current flows from the dynamo G through the wire 3, binding-post l,wire 0, wire p, bindingpost n, resistance F,binding-postm, S-shaped spring E, cut-out lever D, wire 1), and the wires u t of the external circuit. The resistance F, thus suddenly thrown into the circuit, is sufficient to prevent the armature of the dynamo from being overheated.

Having thus described my invention,I claim as new and desire to secure by Letters Patent- 1. In a cut-out for electric-light circuits,the combination of an electro-niagnet arrangedin the circuit, apivoted and spring-actuated cutout lever connected with the magnet and with one of the clectric-light-circuit wires, a counterbalanced armature lever engaging and holding the cut-out lever during the normal working of the circuit, a contact for the cutout lever when disengaged by the armaturelever, and a resistance having one terminal connected with the main circuit and the other with the contact of the cut out lever, substantially as described.

2. In a cut-out for electric-light circuits, the combination of the eleetro-rnagnet B,arranged in the circuit, the pivoted and spring-actuated cut-out lever D, the counterbalanced armature-lever 0, provided with the catch (2, with which the cut-out lever D engages, the wire q, connecting the cut-out lever D with the magnet, the wire p,connecting the said lever with one of the electric-light wires, the wires 0 the spring E, and the resistance F, having one terminal connected to wire 1) and its other to the spring E, substantially as described.

CHARLES D. WRIGHT. Witnesses:

GEORGE F. LUTHRINGER, HENRY O. BROWNBACK. 

